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array.rs
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1563 lines (1418 loc) · 58.4 KB
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pub(crate) use array::make_module;
#[pymodule(name = "array")]
mod array {
use crate::{
common::{
atomic::{self, AtomicUsize},
lock::{
PyMappedRwLockReadGuard, PyMappedRwLockWriteGuard, PyMutex, PyRwLock,
PyRwLockReadGuard, PyRwLockWriteGuard,
},
str::wchar_t,
},
vm::{
builtins::{
PositionIterInternal, PyByteArray, PyBytes, PyBytesRef, PyDictRef, PyFloat, PyInt,
PyIntRef, PyList, PyListRef, PyStr, PyStrRef, PyTupleRef, PyTypeRef,
},
class_or_notimplemented,
convert::{ToPyObject, ToPyResult, TryFromObject},
function::{ArgBytesLike, ArgIntoFloat, ArgIterable, OptionalArg, PyComparisonValue},
protocol::{
BufferDescriptor, BufferMethods, BufferResizeGuard, PyBuffer, PyIterReturn,
PyMappingMethods,
},
sequence::{OptionalRangeArgs, SequenceExt, SequenceMutExt},
sliceable::{
SaturatedSlice, SequenceIndex, SequenceIndexOp, SliceableSequenceMutOp,
SliceableSequenceOp,
},
types::{
AsBuffer, AsMapping, Comparable, Constructor, IterNext, IterNextIterable, Iterable,
PyComparisonOp,
},
AsObject, Py, PyObject, PyObjectRef, PyPayload, PyRef, PyResult, VirtualMachine,
},
};
use itertools::Itertools;
use num_traits::ToPrimitive;
use std::{cmp::Ordering, fmt, os::raw};
macro_rules! def_array_enum {
($(($n:ident, $t:ty, $c:literal, $scode:literal)),*$(,)?) => {
#[derive(Debug, Clone)]
pub enum ArrayContentType {
$($n(Vec<$t>),)*
}
impl ArrayContentType {
fn from_char(c: char) -> Result<Self, String> {
match c {
$($c => Ok(ArrayContentType::$n(Vec::new())),)*
_ => Err(
"bad typecode (must be b, B, u, h, H, i, I, l, L, q, Q, f or d)".into()
),
}
}
fn typecode(&self) -> char {
match self {
$(ArrayContentType::$n(_) => $c,)*
}
}
fn typecode_str(&self) -> &'static str {
match self {
$(ArrayContentType::$n(_) => $scode,)*
}
}
fn itemsize_of_typecode(c: char) -> Option<usize> {
match c {
$($c => Some(std::mem::size_of::<$t>()),)*
_ => None,
}
}
fn itemsize(&self) -> usize {
match self {
$(ArrayContentType::$n(_) => std::mem::size_of::<$t>(),)*
}
}
fn addr(&self) -> usize {
match self {
$(ArrayContentType::$n(v) => v.as_ptr() as usize,)*
}
}
fn len(&self) -> usize {
match self {
$(ArrayContentType::$n(v) => v.len(),)*
}
}
fn reserve(&mut self, len: usize) {
match self {
$(ArrayContentType::$n(v) => v.reserve(len),)*
}
}
fn push(&mut self, obj: PyObjectRef, vm: &VirtualMachine) -> PyResult<()> {
match self {
$(ArrayContentType::$n(v) => {
let val = <$t>::try_into_from_object(vm, obj)?;
v.push(val);
})*
}
Ok(())
}
fn pop(&mut self, i: isize, vm: &VirtualMachine) -> PyResult {
match self {
$(ArrayContentType::$n(v) => {
let i = v.wrap_index(i).ok_or_else(|| {
vm.new_index_error("pop index out of range".to_owned())
})?;
v.remove(i).to_pyresult(vm)
})*
}
}
fn insert(
&mut self,
i: isize,
obj: PyObjectRef,
vm: &VirtualMachine
) -> PyResult<()> {
match self {
$(ArrayContentType::$n(v) => {
let val = <$t>::try_into_from_object(vm, obj)?;
v.insert(i.saturated_at(v.len()), val);
})*
}
Ok(())
}
fn count(&self, obj: PyObjectRef, vm: &VirtualMachine) -> usize {
match self {
$(ArrayContentType::$n(v) => {
if let Ok(val) = <$t>::try_into_from_object(vm, obj) {
v.iter().filter(|&&a| a == val).count()
} else {
0
}
})*
}
}
fn remove(&mut self, obj: PyObjectRef, vm: &VirtualMachine) -> PyResult<()>{
match self {
$(ArrayContentType::$n(v) => {
if let Ok(val) = <$t>::try_into_from_object(vm, obj) {
if let Some(pos) = v.iter().position(|&a| a == val) {
v.remove(pos);
return Ok(());
}
}
Err(vm.new_value_error("array.remove(x): x not in array".to_owned()))
})*
}
}
fn frombytes_move(&mut self, b: Vec<u8>) {
match self {
$(ArrayContentType::$n(v) => {
if v.is_empty() {
// safe because every configuration of bytes for the types we
// support are valid
let b = std::mem::ManuallyDrop::new(b);
let ptr = b.as_ptr() as *mut $t;
let len = b.len() / std::mem::size_of::<$t>();
let capacity = b.capacity() / std::mem::size_of::<$t>();
*v = unsafe { Vec::from_raw_parts(ptr, len, capacity) };
} else {
self.frombytes(&b);
}
})*
}
}
fn frombytes(&mut self, b: &[u8]) {
match self {
$(ArrayContentType::$n(v) => {
// safe because every configuration of bytes for the types we
// support are valid
let ptr = b.as_ptr() as *const $t;
let ptr_len = b.len() / std::mem::size_of::<$t>();
let slice = unsafe { std::slice::from_raw_parts(ptr, ptr_len) };
v.extend_from_slice(slice);
})*
}
}
fn fromlist(&mut self, list: &PyList, vm: &VirtualMachine) -> PyResult<()> {
match self {
$(ArrayContentType::$n(v) => {
// convert list before modify self
let mut list: Vec<$t> = list
.borrow_vec()
.iter()
.cloned()
.map(|value| <$t>::try_into_from_object(vm, value))
.try_collect()?;
v.append(&mut list);
Ok(())
})*
}
}
fn get_bytes(&self) -> &[u8] {
match self {
$(ArrayContentType::$n(v) => {
// safe because we're just reading memory as bytes
let ptr = v.as_ptr() as *const u8;
let ptr_len = v.len() * std::mem::size_of::<$t>();
unsafe { std::slice::from_raw_parts(ptr, ptr_len) }
})*
}
}
fn get_bytes_mut(&mut self) -> &mut [u8] {
match self {
$(ArrayContentType::$n(v) => {
// safe because we're just reading memory as bytes
let ptr = v.as_ptr() as *mut u8;
let ptr_len = v.len() * std::mem::size_of::<$t>();
unsafe { std::slice::from_raw_parts_mut(ptr, ptr_len) }
})*
}
}
fn index(
&self,
obj: PyObjectRef,
start: usize,
stop: usize,
vm: &VirtualMachine
) -> PyResult<usize> {
match self {
$(ArrayContentType::$n(v) => {
if let Ok(val) = <$t>::try_into_from_object(vm, obj) {
if let Some(pos) = v.iter().take(stop as _).skip(start as _).position(|&elem| elem == val) {
return Ok(pos + start);
}
}
Err(vm.new_value_error("array.index(x): x not in array".to_owned()))
})*
}
}
fn reverse(&mut self) {
match self {
$(ArrayContentType::$n(v) => v.reverse(),)*
}
}
fn get(
&self,
i: usize,
vm: &VirtualMachine
) -> Option<PyResult> {
match self {
$(ArrayContentType::$n(v) => {
v.get(i).map(|x| x.to_pyresult(vm))
})*
}
}
fn getitem_by_index(&self, i: isize, vm: &VirtualMachine) -> PyResult {
match self {
$(ArrayContentType::$n(v) => {
v.getitem_by_index(vm, i).map(|x| x.to_pyresult(vm))?
})*
}
}
fn getitem_by_slice(&self, slice: SaturatedSlice, vm: &VirtualMachine) -> PyResult {
match self {
$(ArrayContentType::$n(v) => {
let r = v.getitem_by_slice(vm, slice)?;
let array = PyArray::from(ArrayContentType::$n(r));
array.to_pyresult(vm)
})*
}
}
fn setitem_by_index(
&mut self,
i: isize,
value: PyObjectRef,
vm: &VirtualMachine
) -> PyResult<()> {
match self {
$(ArrayContentType::$n(v) => {
let value = <$t>::try_into_from_object(vm, value)?;
v.setitem_by_index(vm, i, value)
})*
}
}
fn setitem_by_slice(
&mut self,
slice: SaturatedSlice,
items: &ArrayContentType,
vm: &VirtualMachine
) -> PyResult<()> {
match self {
$(Self::$n(elements) => if let ArrayContentType::$n(items) = items {
elements.setitem_by_slice(vm, slice, items)
} else {
Err(vm.new_type_error(
"bad argument type for built-in operation".to_owned()
))
},)*
}
}
fn setitem_by_slice_no_resize(
&mut self,
slice: SaturatedSlice,
items: &ArrayContentType,
vm: &VirtualMachine
) -> PyResult<()> {
match self {
$(Self::$n(elements) => if let ArrayContentType::$n(items) = items {
elements.setitem_by_slice_no_resize(vm, slice, items)
} else {
Err(vm.new_type_error(
"bad argument type for built-in operation".to_owned()
))
},)*
}
}
fn delitem_by_index(&mut self, i: isize, vm: &VirtualMachine) -> PyResult<()> {
match self {
$(ArrayContentType::$n(v) => {
v.del_item_by_index(vm, i)
})*
}
}
fn delitem_by_slice(&mut self, slice: SaturatedSlice, vm: &VirtualMachine) -> PyResult<()> {
match self {
$(ArrayContentType::$n(v) => {
v.del_item_by_slice(vm, slice)
})*
}
}
fn add(&self, other: &ArrayContentType, vm: &VirtualMachine) -> PyResult<Self> {
match self {
$(ArrayContentType::$n(v) => if let ArrayContentType::$n(other) = other {
let elements = v.iter().chain(other.iter()).cloned().collect();
Ok(ArrayContentType::$n(elements))
} else {
Err(vm.new_type_error(
"bad argument type for built-in operation".to_owned()
))
},)*
}
}
fn iadd(&mut self, other: &ArrayContentType, vm: &VirtualMachine) -> PyResult<()> {
match self {
$(ArrayContentType::$n(v) => if let ArrayContentType::$n(other) = other {
v.extend(other);
Ok(())
} else {
Err(vm.new_type_error(
"can only extend with array of same kind".to_owned()
))
},)*
}
}
fn mul(&self, value: isize, vm: &VirtualMachine) -> PyResult<Self> {
match self {
$(ArrayContentType::$n(v) => {
// MemoryError instead Overflow Error, hard to says it is right
// but it is how cpython doing right now
let elements = v.mul(vm, value).map_err(|_| vm.new_memory_error("".to_owned()))?;
Ok(ArrayContentType::$n(elements))
})*
}
}
fn imul(&mut self, value: isize, vm: &VirtualMachine) -> PyResult<()> {
match self {
$(ArrayContentType::$n(v) => {
// MemoryError instead Overflow Error, hard to says it is right
// but it is how cpython doing right now
v.imul(vm, value).map_err(|_| vm.new_memory_error("".to_owned()))
})*
}
}
fn byteswap(&mut self) {
match self {
$(ArrayContentType::$n(v) => {
for element in v.iter_mut() {
let x = element.byteswap();
*element = x;
}
})*
}
}
fn repr(&self, class_name: &str, _vm: &VirtualMachine) -> PyResult<String> {
// we don't need ReprGuard here
let s = match self {
$(ArrayContentType::$n(v) => {
if v.is_empty() {
format!("{}('{}')", class_name, $c)
} else {
format!("{}('{}', [{}])", class_name, $c, v.iter().format(", "))
}
})*
};
Ok(s)
}
fn iter<'a, 'vm: 'a>(
&'a self,
vm: &'vm VirtualMachine
) -> impl Iterator<Item = PyResult> + 'a {
(0..self.len()).map(move |i| self.get(i, vm).unwrap())
}
fn cmp(&self, other: &ArrayContentType) -> Result<Option<Ordering>, ()> {
match self {
$(ArrayContentType::$n(v) => {
if let ArrayContentType::$n(other) = other {
Ok(PartialOrd::partial_cmp(v, other))
} else {
Err(())
}
})*
}
}
fn get_objects(&self, vm: &VirtualMachine) -> Vec<PyObjectRef> {
match self {
$(ArrayContentType::$n(v) => {
v.iter().map(|&x| x.to_object(vm)).collect()
})*
}
}
}
};
}
def_array_enum!(
(SignedByte, i8, 'b', "b"),
(UnsignedByte, u8, 'B', "B"),
(PyUnicode, WideChar, 'u', "u"),
(SignedShort, raw::c_short, 'h', "h"),
(UnsignedShort, raw::c_ushort, 'H', "H"),
(SignedInt, raw::c_int, 'i', "i"),
(UnsignedInt, raw::c_uint, 'I', "I"),
(SignedLong, raw::c_long, 'l', "l"),
(UnsignedLong, raw::c_ulong, 'L', "L"),
(SignedLongLong, raw::c_longlong, 'q', "q"),
(UnsignedLongLong, raw::c_ulonglong, 'Q', "Q"),
(Float, f32, 'f', "f"),
(Double, f64, 'd', "d"),
);
#[derive(Copy, Clone, Ord, PartialOrd, Eq, PartialEq, Debug)]
pub struct WideChar(wchar_t);
trait ArrayElement: Sized {
fn try_into_from_object(vm: &VirtualMachine, obj: PyObjectRef) -> PyResult<Self>;
fn byteswap(self) -> Self;
fn to_object(self, vm: &VirtualMachine) -> PyObjectRef;
}
macro_rules! impl_array_element {
($(($t:ty, $f_from:path, $f_swap:path, $f_to:path),)*) => {$(
impl ArrayElement for $t {
fn try_into_from_object(vm: &VirtualMachine, obj: PyObjectRef) -> PyResult<Self> {
$f_from(vm, obj)
}
fn byteswap(self) -> Self {
$f_swap(self)
}
fn to_object(self, vm: &VirtualMachine) -> PyObjectRef {
$f_to(self).into_pyobject(vm)
}
}
)*};
}
impl_array_element!(
(i8, i8::try_from_object, i8::swap_bytes, PyInt::from),
(u8, u8::try_from_object, u8::swap_bytes, PyInt::from),
(i16, i16::try_from_object, i16::swap_bytes, PyInt::from),
(u16, u16::try_from_object, u16::swap_bytes, PyInt::from),
(i32, i32::try_from_object, i32::swap_bytes, PyInt::fr
2851
om),
(u32, u32::try_from_object, u32::swap_bytes, PyInt::from),
(i64, i64::try_from_object, i64::swap_bytes, PyInt::from),
(u64, u64::try_from_object, u64::swap_bytes, PyInt::from),
(
f32,
f32_try_into_from_object,
f32_swap_bytes,
pyfloat_from_f32
),
(f64, f64_try_into_from_object, f64_swap_bytes, PyFloat::from),
);
fn f32_swap_bytes(x: f32) -> f32 {
f32::from_bits(x.to_bits().swap_bytes())
}
fn f64_swap_bytes(x: f64) -> f64 {
f64::from_bits(x.to_bits().swap_bytes())
}
fn f32_try_into_from_object(vm: &VirtualMachine, obj: PyObjectRef) -> PyResult<f32> {
ArgIntoFloat::try_from_object(vm, obj).map(|x| *x as f32)
}
fn f64_try_into_from_object(vm: &VirtualMachine, obj: PyObjectRef) -> PyResult<f64> {
ArgIntoFloat::try_from_object(vm, obj).map(Into::into)
}
fn pyfloat_from_f32(value: f32) -> PyFloat {
PyFloat::from(value as f64)
}
impl ArrayElement for WideChar {
fn try_into_from_object(vm: &VirtualMachine, obj: PyObjectRef) -> PyResult<Self> {
PyStrRef::try_from_object(vm, obj)?
.as_str()
.chars()
.exactly_one()
.map(|ch| Self(ch as _))
.map_err(|_| vm.new_type_error("array item
E36F
must be unicode character".into()))
}
fn byteswap(self) -> Self {
Self(self.0.swap_bytes())
}
fn to_object(self, _vm: &VirtualMachine) -> PyObjectRef {
unreachable!()
}
}
fn u32_to_char(ch: u32) -> Result<char, String> {
if ch > 0x10ffff {
return Err(format!(
"character U+{:4x} is not in range [U+0000; U+10ffff]",
ch
));
};
char::from_u32(ch).ok_or_else(|| {
format!(
"'utf-8' codec can't encode character '\\u{:x}' \
in position 0: surrogates not allowed",
ch
)
})
}
impl TryFrom<WideChar> for char {
type Error = String;
fn try_from(ch: WideChar) -> Result<Self, Self::Error> {
// safe because every configuration of bytes for the types we support are valid
u32_to_char(ch.0 as u32)
}
}
impl ToPyResult for WideChar {
fn to_pyresult(self, vm: &VirtualMachine) -> PyResult {
Ok(
String::from(char::try_from(self).map_err(|e| vm.new_unicode_encode_error(e))?)
.to_pyobject(vm),
)
}
}
impl fmt::Display for WideChar {
fn fmt(&self, _f: &mut fmt::Formatter<'_>) -> fmt::Result {
unreachable!("`repr(array('u'))` calls `PyStr::repr`")
}
}
#[pyattr]
#[pyattr(name = "ArrayType")]
#[pyclass(name = "array")]
#[derive(Debug, PyPayload)]
pub struct PyArray {
array: PyRwLock<ArrayContentType>,
exports: AtomicUsize,
}
pub type PyArrayRef = PyRef<PyArray>;
impl From<ArrayContentType> for PyArray {
fn from(array: ArrayContentType) -> Self {
PyArray {
array: PyRwLock::new(array),
exports: AtomicUsize::new(0),
}
}
}
#[derive(FromArgs)]
pub struct ArrayNewArgs {
#[pyarg(positional)]
spec: PyStrRef,
#[pyarg(positional, optional)]
init: OptionalArg<PyObjectRef>,
}
impl Constructor for PyArray {
type Args = ArrayNewArgs;
fn py_new(
cls: PyTypeRef,
Self::Args { spec, init }: Self::Args,
vm: &VirtualMachine,
) -> PyResult {
let spec = spec.as_str().chars().exactly_one().map_err(|_| {
vm.new_type_error(
"array() argument 1 must be a unicode character, not str".to_owned(),
)
})?;
let mut array =
ArrayContentType::from_char(spec).map_err(|err| vm.new_value_error(err))?;
if let OptionalArg::Present(init) = init {
if let Some(init) = init.payload::<PyArray>() {
match (spec, init.read().typecode()) {
(spec, ch) if spec == ch => array.frombytes(&init.get_bytes()),
(spec, 'u') => {
return Err(vm.new_type_error(format!(
"cannot use a unicode array to initialize an array with typecode '{}'",
spec
)))
}
_ => {
for obj in init.read().iter(vm) {
array.push(obj?, vm)?;
}
}
}
} else if let Some(utf8) = init.payload::<PyStr>() {
if spec == 'u' {
let bytes = Self::_unicode_to_wchar_bytes(utf8.as_str(), array.itemsize());
array.frombytes_move(bytes);
} else {
return Err(vm.new_type_error(format!(
"cannot use a str to initialize an array with typecode '{}'",
spec
)));
}
} else if init.payload_is::<PyBytes>() || init.payload_is::<PyByteArray>() {
init.try_bytes_like(vm, |x| array.frombytes(x))?;
} else if let Ok(iter) = ArgIterable::try_from_object(vm, init.clone()) {
for obj in iter.iter(vm)? {
array.push(obj?, vm)?;
}
} else {
init.try_bytes_like(vm, |x| array.frombytes(x))?;
}
}
let zelf = Self::from(array).into_ref_with_type(vm, cls)?;
Ok(zelf.into())
}
}
#[pyclass(
flags(BASETYPE),
with(Comparable, AsBuffer, AsMapping, Iterable, Constructor)
)]
impl PyArray {
fn read(&self) -> PyRwLockReadGuard<'_, ArrayContentType> {
self.array.read()
}
fn write(&self) -> PyRwLockWriteGuard<'_, ArrayContentType> {
self.array.write()
}
#[pygetset]
fn typecode(&self, vm: &VirtualMachine) -> PyStrRef {
vm.ctx
.intern_str(self.read().typecode().to_string())
.to_owned()
}
#[pygetset]
fn itemsize(&self) -> usize {
self.read().itemsize()
}
#[pymethod]
fn append(zelf: PyRef<Self>, x: PyObjectRef, vm: &VirtualMachine) -> PyResult<()> {
zelf.try_resizable(vm)?.push(x, vm)
}
#[pymethod]
fn buffer_info(&self) -> (usize, usize) {
let array = self.read();
(array.addr(), array.len())
}
#[pymethod]
fn count(&self, x: PyObjectRef, vm: &VirtualMachine) -> usize {
self.read().count(x, vm)
}
#[pymethod]
fn remove(zelf: PyRef<Self>, x: PyObjectRef, vm: &VirtualMachine) -> PyResult<()> {
zelf.try_resizable(vm)?.remove(x, vm)
}
#[pymethod]
fn extend(zelf: PyRef<Self>, obj: PyObjectRef, vm: &VirtualMachine) -> PyResult<()> {
let mut w = zelf.try_resizable(vm)?;
if zelf.is(&obj) {
w.imul(2, vm)
} else if let Some(array) = obj.payload::<PyArray>() {
w.iadd(&array.read(), vm)
} else {
let iter = ArgIterable::try_from_object(vm, obj)?;
// zelf.extend_from_iterable(iter, vm)
for obj in iter.iter(vm)? {
w.push(obj?, vm)?;
}
Ok(())
}
}
fn _wchar_bytes_to_string(
bytes: &[u8],
item_size: usize,
vm: &VirtualMachine,
) -> PyResult<String> {
if item_size == 2 {
// safe because every configuration of bytes for the types we support are valid
let utf16 = unsafe {
std::slice::from_raw_parts(
bytes.as_ptr() as *const u16,
bytes.len() / std::mem::size_of::<u16>(),
)
};
Ok(String::from_utf16_lossy(utf16))
} else {
// safe because every configuration of bytes for the types we support are valid
let chars = unsafe {
std::slice::from_raw_parts(
bytes.as_ptr() as *const u32,
bytes.len() / std::mem::size_of::<u32>(),
)
};
chars
.iter()
.map(|&ch| {
// cpython issue 17223
u32_to_char(ch).map_err(|msg| vm.new_value_error(msg))
})
.try_collect()
}
}
fn _unicode_to_wchar_bytes(utf8: &str, item_size: usize) -> Vec<u8> {
if item_size == 2 {
utf8.encode_utf16()
.flat_map(|ch| ch.to_ne_bytes())
.collect()
} else {
utf8.chars()
.flat_map(|ch| (ch as u32).to_ne_bytes())
.collect()
}
}
#[pymethod]
fn fromunicode(zelf: PyRef<Self>, obj: PyObjectRef, vm: &VirtualMachine) -> PyResult<()> {
let utf8 = PyStrRef::try_from_object(vm, obj.clone()).map_err(|_| {
vm.new_type_error(format!(
"fromunicode() argument must be str, not {}",
obj.class().name()
))
})?;
if zelf.read().typecode() != 'u' {
return Err(vm.new_value_error(
"fromunicode() may only be called on unicode type arrays".into(),
));
}
let mut w = zelf.try_resizable(vm)?;
let bytes = Self::_unicode_to_wchar_bytes(utf8.as_str(), w.itemsize());
w.frombytes_move(bytes);
Ok(())
}
#[pymethod]
fn tounicode(&self, vm: &VirtualMachine) -> PyResult<String> {
let array = self.array.read();
if array.typecode() != 'u' {
return Err(vm.new_value_error(
"tounicode() may only be called on unicode type arrays".into(),
));
}
let bytes = array.get_bytes();
Self::_wchar_bytes_to_string(bytes, self.itemsize(), vm)
}
fn _from_bytes(&self, b: &[u8], itemsize: usize, vm: &VirtualMachine) -> PyResult<()> {
if b.len() % itemsize != 0 {
return Err(
vm.new_value_error("bytes length not a multiple of item size".to_owned())
);
}
if b.len() / itemsize > 0 {
self.try_resizable(vm)?.frombytes(b);
}
Ok(())
}
#[pymethod]
fn frombytes(&self, b: ArgBytesLike, vm: &VirtualMachine) -> PyResult<()> {
let b = b.borrow_buf();
let itemsize = self.read().itemsize();
self._from_bytes(&b, itemsize, vm)
}
#[pymethod]
fn fromfile(&self, f: PyObjectRef, n: isize, vm: &VirtualMachine) -> PyResult<()> {
let itemsize = self.itemsize();
if n < 0 {
return Err(vm.new_value_error("negative count".to_owned()));
}
let n = vm.check_repeat_or_overflow_error(itemsize, n)?;
let nbytes = n * itemsize;
let b = vm.call_method(&f, "read", (nbytes,))?;
let b = b
.downcast::<PyBytes>()
.map_err(|_| vm.new_type_error("read() didn't return bytes".to_owned()))?;
let not_enough_bytes = b.len() != nbytes;
self._from_bytes(b.as_bytes(), itemsize, vm)?;
if not_enough_bytes {
Err(vm.new_exception_msg(
vm.ctx.exceptions.eof_error.to_owned(),
"read() didn't return enough bytes".to_owned(),
))
} else {
Ok(())
}
}
#[pymethod]
fn byteswap(&self) {
self.write().byteswap();
}
#[pymethod]
fn index(
&self,
x: PyObjectRef,
range: OptionalRangeArgs,
vm: &VirtualMachine,
) -> PyResult<usize> {
let (start, stop) = range.saturate(self.len(), vm)?;
self.read().index(x, start, stop, vm)
}
#[pymethod]
fn insert(
zelf: PyRef<Self>,
i: isize,
x: PyObjectRef,
vm: &VirtualMachine,
) -> PyResult<()> {
let mut w = zelf.try_resizable(vm)?;
w.insert(i, x, vm)
}
#[pymethod]
fn pop(zelf: PyRef<Self>, i: OptionalArg<isize>, vm: &VirtualMachine) -> PyResult {
let mut w = zelf.try_resizable(vm)?;
if w.len() == 0 {
Err(vm.new_index_error(&
9CA1
quot;pop from empty array".to_owned()))
} else {
w.pop(i.unwrap_or(-1), vm)
}
}
#[pymethod]
pub(crate) fn tobytes(&self) -> Vec<u8> {
self.read().get_bytes().to_vec()
}
#[pymethod]
fn tofile(&self, f: PyObjectRef, vm: &VirtualMachine) -> PyResult<()> {
/* Write 64K blocks at a time */
/* XXX Make the block size settable */
const BLOCKSIZE: usize = 64 * 1024;
let bytes = self.read();
let bytes = bytes.get_bytes();
for b in bytes.chunks(BLOCKSIZE) {
let b = PyBytes::from(b.to_vec()).into_ref(vm);
vm.call_method(&f, "write", (b,))?;
}
Ok(())
}
pub(crate) fn get_bytes(&self) -> PyMappedRwLockReadGuard<'_, [u8]> {
PyRwLockReadGuard::map(self.read(), |a| a.get_bytes())
}
pub(crate) fn get_bytes_mut(&self) -> PyMappedRwLockWriteGuard<'_, [u8]> {
PyRwLockWriteGuard::map(self.write(), |a| a.get_bytes_mut())
}
#[pymethod]
fn tolist(&self, vm: &VirtualMachine) -> PyResult<Vec<PyObjectRef>> {
let array = self.read();
let mut v = Vec::with_capacity(array.len());
for obj in array.iter(vm) {
v.push(obj?);
}
Ok(v)
}
#[pymethod]
fn fromlist(zelf: PyRef<Self>, list: PyListRef, vm: &VirtualMachine) -> PyResult<()> {
zelf.try_resizable(vm)?.fromlist(&list, vm)
}
#[pymethod]
fn reverse(&self) {
self.write().reverse()
}
#[pymethod(magic)]
fn copy(&self) -> PyArray {
self.array.read().clone().into()
}
#[pymethod(magic)]
fn deepcopy(&self, _memo: PyObjectRef) -> PyArray {
self.copy()
}
fn _getitem(&self, needle: &PyObject, vm: &VirtualMachine) -> PyResult {
match SequenceIndex::try_from_borrowed_object(vm, needle, "array")? {
SequenceIndex::Int(i) => self.read().getitem_by_index(i, vm),
SequenceIndex::Slice(slice) => self.read().getitem_by_slice(slice, vm),
}
}
#[pymethod(magic)]
fn getitem(&self, needle: PyObjectRef, vm: &VirtualMachine) -> PyResult {
self._getitem(&needle, vm)
}
fn _setitem(
zelf: PyRef<Self>,
needle: &PyObject,
value: PyObjectRef,
vm: &VirtualMachine,
) -> PyResult<()> {
match SequenceIndex::try_from_borrowed_object(vm, needle, "array")? {
SequenceIndex::Int(i) => zelf.write().setitem_by_index(i, value, vm),
SequenceIndex::Slice(slice) => {
let cloned;
let guard;
let items = if zelf.is(&value) {
cloned = zelf.read().clone();
&cloned
} else {
match value.payload::<PyArray>() {
Some(array) => {
guard = array.read();
&*guard
}
None => {
return Err(vm.new_type_error(format!(
"can only assign array (not \"{}\") to array slice",
value.class()
)));
}
}
};
if let Ok(mut w) = zelf.try_resizable(vm) {
w.setitem_by_slice(slice, items, vm)
} else {
zelf.write().setitem_by_slice_no_resize(slice, items, vm)